Hazardous-area motor starting with ATEX and IECEx
The 3RW5527-1HA16 carries ATEX and IECEx certification, so it can start motors in Zone 1 or Zone 2 gas atmospheres and Zone 21 or Zone 22 dust atmospheres without an external isolation barrier — the soft starter itself is the certified interface between the hazardous-area motor and the safe-area control system.
Trip class and starting profile flexibility
Voltage ramp, torque control, breakaway pulse, and pump ramp down are all built in — the pump ramp down feature extends the deceleration time to prevent water hammer in wastewater lift stations, and the breakaway pulse clears a stuck pump impeller before the ramp starts. DC braking is included for rapid stopping of high-inertia loads without a separate braking contactor.
Fieldbus and diagnostics for integrated lines
Native support for PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP means this unit drops into existing control architectures without a gateway — the commissioning engineer sets the protocol once and the soft starter appears as a standard device on the network. An analog output configurable for 4-20 mA or 0-10 V provides motor current or power feedback to a PLC or SCADA, and the event list and error logbook store the last several fault events with timestamps for root-cause analysis after a trip. The trace function captures motor current and voltage waveforms during a start event — useful for verifying the ramp profile during commissioning or after a parameter change.
Panel fit and clearance planning
Dimensions are 185 mm wide, 306 mm high, and 203 mm deep — it occupies roughly the footprint of a large contactor and fits a standard 600 mm deep enclosure with room for the main disconnect upstream. Required clearances: 100 mm above, 75 mm below, 10 mm in front, 5 mm at the sides, and 0 mm behind — the zero rear clearance means it can mount flush against the back panel, saving depth for the main bus bars. Screw terminals on the power and control connections — no special crimp tooling needed for field wiring, and the terminals accept standard ring or fork lugs up to the rated wire size.
Compliance and approvals for global installs
CE marked for European markets, UL and CSA approved for North American installations — the same unit ships to both regions without a hardware variant. Accuracy Class 5 per IEC 61557-12 means the integrated current and voltage measurement meets metering-grade standards — no separate power meter needed for motor energy monitoring.